operating system

The arrival time of the process P1, P2, and P3 and their CPU-Burst time (unit time) are shown in the following table. Answer the following questions: When using FIFO scheduling algorithm, (1) The turnaround time of P1 is: (a) 20 (b) 23 (c) 24 (d) 22.3 (2) The turnaround time of P2 is: (a) 20 (b) 23 (c) 24 (d) 22.3 (3) The turnaround time of P3 is: (a) 20 (b) 23 (c) 24 (d) 22.3 (4) The average turnaround time is: (a) 20 (b) 23 (c) 24 (d) 22.3